CVE-2021-22886

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Rocket.Chat before 3.11, 3.10.5, 3.9.7, 3.8.8 is vulnerable to persistent cross-site scripting (XSS) using nested markdown tags allowing a remote attacker to inject arbitrary JavaScript in a message. This flaw leads to arbitrary file read and RCE on Rocket.Chat desktop app.

Rocket.Chat versiones anteriores a 3.11, 3.10.5, 3.9.7, 3.8.8, es vulnerable a ataques de tipo cross-site scripting (XSS) persistente que usan etiquetas markdown anidadas que permiten a un atacante remoto inyectar JavaScript arbitrario en un mensaje. Este fallo conlleva a una lectura de archivos arbitraria y una RCE en la aplicación de escritorio Rocket.Chat.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-06 CVE Reserved
2021-03-26 CVE Published
2023-12-10 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CAPEC

References (3)

URL	Tag	Source
https://hackerone.com/reports/1014459	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://github.com/RocketChat/Rocket.Chat/pull/20430	2021-03-30

URL	Date	SRC
https://docs.rocket.chat/guides/security/security-updates	2021-03-30

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Rocket.chat Search vendor "Rocket.chat"		Rocket.chat Search vendor "Rocket.chat" for product "Rocket.chat"				< 3.8.8 Search vendor "Rocket.chat" for product "Rocket.chat" and version " < 3.8.8"		-		Affected
Rocket.chat Search vendor "Rocket.chat"		Rocket.chat Search vendor "Rocket.chat" for product "Rocket.chat"				>= 3.9.0 < 3.9.7 Search vendor "Rocket.chat" for product "Rocket.chat" and version " >= 3.9.0 < 3.9.7"		-		Affected
Rocket.chat Search vendor "Rocket.chat"		Rocket.chat Search vendor "Rocket.chat" for product "Rocket.chat"				>= 3.10.0 < 3.10.5 Search vendor "Rocket.chat" for product "Rocket.chat" and version " >= 3.10.0 < 3.10.5"		-		Affected
Rocket.chat Search vendor "Rocket.chat"		Rocket.chat Search vendor "Rocket.chat" for product "Rocket.chat"				3.11.0 Search vendor "Rocket.chat" for product "Rocket.chat" and version "3.11.0"		rc0		Affected
Rocket.chat Search vendor "Rocket.chat"		Rocket.chat Search vendor "Rocket.chat" for product "Rocket.chat"				3.11.0 Search vendor "Rocket.chat" for product "Rocket.chat" and version "3.11.0"		rc1		Affected
Rocket.chat Search vendor "Rocket.chat"		Rocket.chat Search vendor "Rocket.chat" for product "Rocket.chat"				3.11.0 Search vendor "Rocket.chat" for product "Rocket.chat" and version "3.11.0"		rc2		Affected
Rocket.chat Search vendor "Rocket.chat"		Rocket.chat Search vendor "Rocket.chat" for product "Rocket.chat"				3.11.0 Search vendor "Rocket.chat" for product "Rocket.chat" and version "3.11.0"		rc3		Affected
Rocket.chat Search vendor "Rocket.chat"		Rocket.chat Search vendor "Rocket.chat" for product "Rocket.chat"				3.11.0 Search vendor "Rocket.chat" for product "Rocket.chat" and version "3.11.0"		rc4		Affected
Rocket.chat Search vendor "Rocket.chat"		Rocket.chat Search vendor "Rocket.chat" for product "Rocket.chat"				3.11.0 Search vendor "Rocket.chat" for product "Rocket.chat" and version "3.11.0"		rc5		Affected
Rocket.chat Search vendor "Rocket.chat"		Rocket.chat Search vendor "Rocket.chat" for product "Rocket.chat"				3.11.0 Search vendor "Rocket.chat" for product "Rocket.chat" and version "3.11.0"		rc6		Affected
Rocket.chat Search vendor "Rocket.chat"		Rocket.chat Search vendor "Rocket.chat" for product "Rocket.chat"				3.11.0 Search vendor "Rocket.chat" for product "Rocket.chat" and version "3.11.0"		rc7		Affected